Thank you for contacting Mearto with your appraisal inquiry.

It is a beautiful Edwin Knowles doll. Such vintage dolls are being offered at auction on a regular basis.
The handcrafted Heather doll by Edwin Knowles china factory is very well made with many exquisite details. You doll appears to be in very good condition with the original box and clothes which is important for the second hand value. However mass produced porcelain dolls rarely have value beyond their purchase price even when kept in excellent shape.
The value of all your dolls is determined by the company that made them and how many dolls were made from each lot. Normally these companies produce dolls in lots of 1000 to 2000 dolls. The company of Edwin M Knowles China Company was one of these companies to mass produce dolls. And unfortunately the market value for such dolls has declined in the past few years.
The selling price depends on the originality of the doll, how the condition is and if it is a rare doll. In this case the doll is in very good condition, the original clothes is there and in good condition. However it still is a doll that was made in several thousands numbers despite the limited edition proof.

The estimate provided is for a well-advertised specialised online vintage toys auction, where I believe the Heather doll has the best chance of realising its fullest potential. However, there is no measurement for the sentimental value you might attach to the Edwin Knowles doll. There are quite a few Edwin Knowles dolls for sale on the internet at present. Retail "asking prices" can be higher and vary.

Please let me know if you have any additional questions. I’m happy to help.
Thank you